Proceedings. 



Ordinary Meeting, October 30th, 1894. 

 Henry Wilde, F.R.S., President, in the Chair. 



The thanks of the members were voted to the donors of 

 the books upon the table. 



A paper by Mr. Bevan Lean, B.A., D.Sc, on "The 

 Affinities of Polybasic Acids," communicated by Prof. W. 

 H. Perkin, jun., F.R.S., was read. A discussion followed, in 

 which Mr. R. L. Taylor, Dr. Ree, and Mr. Francis Jones 

 took part. 



Mr. H. B. POLLARD, B.A., D.Sc, introduced by Mr. 

 R. F. GWYTHER, M.A., exhibited some models of siluroid 

 fish, drawing attention to their construction. The models 

 had been made after the manner well known in Germany, 

 (invented by Born), but they were electroplated and produced 

 on a much larger scale. The morphological features 

 revealed led to the formation of a new theory on labial 

 structure and the origin of part of the skull of vertebrates, 

 which the author termed the Cirrostome-theory. The 

 labial and other structures round the mouth were homo- 

 logous with the oral cirri of Myxine and Amphioxus. 



